Frequency-shifted feedback cavity used as a phased array antenna controller and carrier interference multiple access spread-spectrum transmitter
a frequency-shifted feedback cavity and antenna controller technology, applied in pulse techniques, instruments, and using reradiation, etc., can solve the problems of large scale, complex process, and difficult implementation of adaptive array deployment, and achieve the effect of easy adaptation
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[0047]The standard method for sustaining laser oscillation uses feedback from a Fabry-Perot cavity. The multiple reflections within the cavity lead to destructive interference for all frequencies of light except those discreet frequencies that correspond to the standing waves of the cavity. This is demonstrated by frequency discrimination that occurs within an etalon. The intensity of light that is transmitted through an etalon is sharply peaked at the resonance of the cavity. Non-resonant waves destructively interfere within the cavity, thus canceling almost entirely. Therefore, a Fabry-Perot cavity used as a feedback cavity in a laser causes the laser output power to be distributed in a narrow spectral region that corresponds to the modes of the cavity.
[0048]A traveling-wave FSFC laser, as described in the cited papers co-authored by applicant, does not selectively attenuate frequencies. Rather, this laser is characterized by its unusually broad spectral output, which has no mode ...
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